Fridge upgrade question

I spent 800 genomes on the fridge upgrade and it gave me a blueprint, but there’s no upgrade arrow on my fridge and the blueprint does nothing. The fridge is currently level 5 (12 slots, 200 items each slot). How do I upgrade the fridge? Usually there’s an arrow icon near the item name when you go into the item’s inventory window but my fridge isn’t showing that option for whatever reason.